diff --git a/m4/userspec.m4 b/m4/userspec.m4
index 1abfd5776..00ec209f5 100644
--- a/m4/userspec.m4
+++ b/m4/userspec.m4
@@ -1,4 +1,4 @@
-# userspec.m4 serial 6
+#serial 7
 dnl Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -6,7 +6,7 @@ dnl with or without modifications, as long as this notice is preserved.
 
 AC_DEFUN([gl_USERSPEC],
 [
-  AC_LIBSOURCES([userspec.c, userspec.h])
+  AC_LIBSOURCES([userspec.c, userspec.h, intprops.h])
   AC_LIBOBJ([userspec])
 
   dnl Prerequisites of lib/userspec.c.